Door lock and keeper



Dec. 6, 1966 s. B. MCKENZIE DOOR LOCK AND KEEPER 2 Sheets-Sheet 1 FiledMarch 22, 1965 w m W7 2' Ch -52 'Dec. 6, 1966 s McKENZIE 3,290,079

DOOR LOCK AND KEEPER Filed March 22, 1965 -2 Sheets-Sheet 2 UnitedStates Patent 3,290,079 DOOR LOCK AND KEEPER Samuel B. McKenzie,Calgary, Alberta, Canada, assignor to John M. Jamison, James T. Smith,and William G. Fyfe, all of Calgary, Alberta, Canada Filed Mar. 22,1965, Ser. No. 441,742 3 Claims. (Cl. 292-172) This application is acontinuation-in-part of my copending application Serial No. 235,279filed November 5, 1962 and now abandoned.

My invention relates to new and useful improvements in self-adjustingdoor bolt devices particularly suitable for use in ships, planes,aircraft and any mobile vehicles and transportation units.

I have prevented inadvertent opening by providing a door lock whichincludes a sliding bolt operated by a rack and pinion which, in turn, isconnected to the conventional handle, said bolt including a transverselysituated dead lock cross bar in the extending end of said bolt which isadapted to extend at right angles when the bolt is extended and engagebehind a conventional keeper plate, thus giving a bolting action in twodirections, namely, in the longitudinal direction by the engagement ofthe bolt with the keeper plate and at right angles thereto by theengagement of the dead lock cross bar behind the keeper plate.

The principal object of my invention is, therefore, to provide a doorlock or latch which engages the door frame and keeper plate in twodirections.

A further object of my invention is to provide a device of the characterherein described which, when bolted, is unable to be forced by theconventional method of sliding a thin blade between the door frame andthe bolt.

Another object of my invention is to provide a device of the characterherein described which includes means to maintain the door bolt in theretracted position without the use of special plungers, catches or otherimpediments.

A still further object of my invention is to provide a device of thecharacter herein described which is assembled without the usual screws,bolts, etc., which often become loose and disengaged due to thecontinuous vibration usually encountered in the Vehicle andtransportation units above referred to.

Another object of my invention is to provide a device of the characterherein described which is readily adapted for use with a conventionalkey-operated lock upon one side thereof.

Another object of my invention is to provide a device of the characterherein described which is adaptable for use in conventional doors andcan be installed therein readily and easily.

Other objects of the invention will become apparent from the followingdescription in conjunction with the accompanying drawings wherein:

FIGURE 1 is a fragmentary perspective view of the edge of a door showingthe bolting device in situ and being viewed from the inside orhandle-operated side,

FIGURE 2 is a top plan view of the bolting device with the handledsectioned to show the interior thereof,

FIGURE 3 is a side cross section view of the bolting mechanism insemi-retracted position, and is a view along the line 33 of FIGURE 2,

FIGURE 4 is a side cross section view of the bolting mechanism in fullyextended position,

FIGURE 5 is a top cross section view of the bolting mechanismillustrating the bolt in fully extended position,

FIGURE 6 is a top cross section view of the bolting mechanismillustrating the bolt in semi-retracted position,

FIGURE 7 is an end view of one of the clutch members in the handle, and

FIGURE 8 is a view of FIGURE 7 but at right angles thereto.

The invention will now be more fully described with reference to theaccompanying drawings.

In FIGURE 1, numeral 1 represents a portion of a door, and including avertical side or edge 2. The bolt which is generally designated bynumeral 3, includes a cylindrical chamber 4 (see also FIGURES 2, 3, 4, 5and 6) having a retaining plate 5 secured to one end thereof by means ofwhich the bolt assembly is held in position by screws 6 passing throughthe plate 5 and into the side 2 of the door. With this construction thebolt assembly can be mounted in a door by drilling a cylindrical hole 7inwardly from the edge 2, and by providing a second drill hole at rightangles to the first hole, and through which a spindle passes.

A hollow sleeve 8 is journaled for rotation transversely across innerend 9 (see FIGURE 3) of the cylinder 4 and is fixedly secured to apinion 10 which is positioned within the end 9 of the chamber 4. A mainshaft or spindle 11 passes through the sleeve 8 and extends upon eitherside (see also FIGURE 2). With reference to FIGURE 2 it will be seenthat one end 12 of the sleeve 8 is provided with diametrically opposedslots 13 (see also FIGURE 4). Spindle 11 is provided with a drill holeto accommodate a pin 14, so that when pin 14 is positioned within slots13 and through the hole provided in spindle 11, rotation of spindle 11results in correspond ing rotation in sleeve 8 and attached pinion 10.

With reference, now, to the left hand side of FIGURE 2, a conventionallock barrel 15 mounted upon one side of the door 1 is connected to oneend of spindle 11 by means of a conventional universal joint 16. Thisarrangement thus permits slight misalignment of the parts in mounting.

A handle assembly collectively designated at 17 is mounted upon theopposite end of the spindle 11. A rotatable handle element 47 isprovided with an axially located tubular barrel 48 which is rotatablewithin handle 47. The outermost end of the barrel 48 is machined to forma plug 54 (see FIGURE 2), which plug 54 is provided with a concavesloping profile 49. A cylindrical plug 50 having a profile 51corresponding to profile 49, upon the innermost end thereof, is adaptedto slip over the extremity of the spindle 11 and be secured thereto bymeans of a transverse pin 52 extending through slot 52 in spindle 11.Handle 47 is then fixedly secured to cylindrical plug 50.

A compression spring 53 surrounds the spindle 11 and reacts between plug54 in the outermost end of barrel 48 and a cylindrical clutch member 55positioned within the innermost end of barrel 48, around cylindricalsleeve 55' and hence around spindle 11. FIGURES 7 and 8 show theconstruction of this clutch member 55, and it will be seen from FIGURE 8that the member 55 is provided 8, the clutch member 55 is provided withtwo sloping or cam faces 58 and two right angular faces 63. A secondclutch member 60 is provided with sloping surfaces 58 and right anglefaces (not shown) which are the reverse of the faces 58 and 63 on clutchmember 55. The second clutch member 60 is fixedly secured within anescutcheon plate 61, which plate 61 is prevented from rotation by theprovision of a pin 62 which engages the face of the door 1. With thisconstruction, with clutch member 60 secured to escutcheon plate 61 whichis held from rotation by pin 62, and with clutch member 55 held fromindependent rotation from barrel 48 and handle 47 by ridge 57 and groove56, it will be seen that as right angle clutch faces 63 on clutch member55 oppose the right angle clutch faces (not shown) on clutch member 56,rotation of handle 47 in a counter-clockwise direction is resisted.

Spring 53 acting between the escutcheon plate 61 (through the clutchmembers 55 and 60) and the plug 54 in barrel 48, maintains the handle inoutermost position and maintains tension on the spindle 11 andengagement of the pin 14 within slot 13 in sleeve 8. When the completebolt assembly is mounted in a door the escutcheon plate is rotated untilthe clutch faces of both clutch members 55 and 60 are in completeengagement, and the bolt 28 is fully extended from cylinder 4 and deadlock cross bar 34 is in its fully extended position (as shown also inFIGURE at which time escutcheon plate is fixed from further rotation bydriving pin 62 into the face of the door.

, By turning the handle 47 in a clockwise direction to withdraw bolt 28within cylinder 4, spring resistance will be felt due to cam faces 58 ofclutch member 55 riding up on cam faces 58' by clutch member 60 againstthe ten sion of spring 53. Due to this spring tension, the handle willtend to return to its original position after the door is opened and thehandle released.

From FIGURE 2 it will be noted that barrel 48 may be displaced furtherwithin escutcheon plate 61, and against the action of spring 53 by theapplication of pressure in the direction of arrow 100, in FIGURE 2. Byapplying pressure in the direction of arrow 100, handle 47 will as sumethe position illustrated in broken lines at 101 in FIGURE 2. The handlemay be pushed in due to the provision of slot 52' through which pin 52passes. The purpose for this, and the relationship between the handleand the bolt mechanism, will be explained in more detail hereinafter.

Referring, now, to FIGURES 3 and 4, it will be noted that rack member19, having teeth upon the underside thereof, is mounted for axialmovement within chamber 4, and the inner wall of the chamber 4 isgrooved (not shown) at this point to maintain alignment of the rack 19.The rack 19 engages the 'pinion 10 and is adapted for reciprocalmovement in the direction of the doubleheaded arrow 21 in FIGURE 3, byrotation of the spindle .11.

Secured to inner end 22 of the rack 19 and depending downwardlytherefrom is a head piece 23 which surrounds rear or inner end 24 of abolt draw bar 25, and the headpiece is secured to the bolt draw bar bymeans of pin 26 so that by the aforementioned reciprocal movement of therack 19 corresponding reciprocal movement of the bolt draw bar isinitiated. The bolt draw bar 25 is supported substantially centrallyWithin the chamber 4, by means of bearing partition 27 secured withinthe chamber substantially medially the ends thereof. A cylindrical bolt28 is journaled for axial movement Within outer end 29 of the chamber 4and is adapted to extend beyond the plate 5 and to be retractedsubstantially flush therewith. This bolt 28 is beveled on the outer end,as

illustrated by numeral 30, to facilitate the engagement thereof with theconventional keeper plate in the door frame (not shown).

The bolt 28 is provided with an axially located longitudinal drilling 31leading from the rearface 32 thereof,

and the drilling communicates with a transverse drilling or recess 33formed through the side of the bolt adjacent outer end 32' thereof. Inthis embodiment, the drilling or recess 33 is substantially square whenviewed in FIG- URE 3, and is adapted to slidably receive a dead lockcross bar 34 (FIGURES 1 and 5). This dead lock cross bar is adapted tobe moved endwise within the recess 33 so that it extends as shown inFIGURE 1 or, alternatively, be retracted flush with the surface of thebolt as shown, for example, in FIGURE 6.

The dead lock cross bar 34 is provided with a coned aperture 35 (seeFIGURES 5 and 6) upon the inner surface thereof, engageable by acorresponding coned end 37 formed on the outer end of the bolt draw bar25, so that when the end 37 engages the recess 35 the cam actionprovided by the coned surfaces extends the dead lock cross bar 34 atright angles from the bolt.

A longitudinal recess 38 (FIGURES 5 and 6) is formed in the wall of thedrilling in the bolt'28 and a pin 39 secured to the draw bar 25 extendsperpendicularly therefrom, with the end of the pin engaging the recess38. This connects the bolt draw bar 25 with the bolt 28 but permitsslight independent movement between the two. A coil spring 40 surroundsthe draw bar 25 and reacts between the bearing partition 27 and theinner or rear surface 32 of the bolt, thus normally extending the boltunless otherwise prevented by means to be described hereinafter.

Finally, before leaving the description of the bolt, it will be observedthat there is '-a small recess 41 (FIG- URE 6) formed upon the sidesurface of the bolt and towards the end 32 thereof, engageable by asmall pin 41' secured to the forward end ofthe chamber wall 4, thuslimiting the outward movement of the bolt and preventing rotationthereof within the chamber.

Means are provided to maintain the bolt 28 in either the extendedposition (see broken lines in FIGURES 3 and 6) or in semi-retractedposition (see full lines in FIGURES 3 and 6).

With reference to FIGURES 3 and 4, a round nosed cam 42 is pivotedwithin the chamber uponlpin 43 and is maintained normally in theposition shown in FIG- URE 4 by a small spring 44 extending between thetail of the cam and the partition :27. v

A pin 45 is mounted for a sliding or loose fit in an aperture within thebearing partition 27 and is situated parallel to the draw bar 25. Thispin 45 freely engages the rear end wall 32 of the bolt 28 and the frontside of the cam lobe 46. From the showing in FIGURE 3 it will beappreciated that cam 42 cannot be rotated in a counterclockwisedirection and hence bolt 28 cannot move from the semi-retracted positionto the fully extended position shown in dotted lines in FIGURE 3,because of the bind ing action between shoulder 36 of cam 42 and thelowermost end of head piece 23. To achieve the result of having bolt 28extend to its fully extended position from the position shown in fulllines in FIGURE 4 it is necessary first to pivot cam 42 in a clockwisedirection to allow the head piece 23 to pass over the cam 42 and toassume the position shown in FIGURE 4. This may be accomplished in oneof two ways: (1) by turning handle 47 in a clockwise direction, rack 19will move to the right in FIGURE 4 and, by means of head piece 23 anddraw bar 25, will also draw bolt 28 to the right. Bolt 28 contacts pin45 and moves pin 45 to the right. and pin 45 contacts cam 42 and pivotssame in a clockwise direction to allow head piece 23 to pass over cam42, and the various components will assume the position shown in FIGURE4; (2) when the door is in open position the bolt 28 is in the positionshown in FIGURE 3. When the door is being closed the bevelled portion 30on the end of bolt 28 strikes against the keeper plate (not shown) onthe door frame, and due to the action of the keeper plate on thebevelled end 30 of bolt 28the bolt is moved to the right in FIGURE 4,and the bolt is then free to assume its fully extended position as shownin FIGURE 4 for the reasons outlined above.

As head piece 23 overrides cam 42 the action of spring 40 causes bolt 28to assume its fully extended position, and this outward extension ofbolt 28 is limited only by the stopping action of pin 41' which rideswithin slot 41 provided in bolt 28 (see FIGURE 6).

When bolt 28 reaches its fullyextended position and is prevented fromfurther'extension by pin 41, draw bar 25 is urged further to the leftdue to the action of cam faces 58 and 59 on each other under the actionof spring 53. As draw bar 25 moves to the left after bolt 28 is stoppedby pin 41', the cone-shaped end 37 (see FIG- URE 4) of draw bar 25engages the cammed recess 35 of dead lock cross bar 34, and urges thedead lock cross bar 34 to its extended position (at right angles to theextended position of bolt 28) as shown in FIGURES l, and 6.

The lock is then in the door closed position, and the bolt 28 and bar 34may be returned to their position within chamber 4 only by rotatingeither of the door handles. Pressure applied against the ends of bolt 28or bar 34 is of no avail, and the bolt may be retracted only by rotatingthe door handles.

To retract the bolt and open the door the door handle 47 is rotatedclockwise as viewed in FIGURE 1. By rotating handle 47 clockwise rack 19and head piece 23 are moved to the right. Draw bar 25 also moves to theright and its cone-shaped end 37 is withdrawn from the cammed recessprovided in dead lock cross [bar 34, and pin 39 on draw bar contacts theinnermost end of longitudinal slot 38provided in the bolt 28, and bolt28 is also withdrawn to the right. In FIGURE 6 it will be noted that theend of the dead lock cross bar is bevelled as at 34'. As cone 37 hasbeen withdrawn from cross bar 34, and as bolt 28 is being withdrawnwithin cylinder 4, the action of the edge of plate 5 against thebevelled surface 34' of cross bolt 34 urges the cross bar 34 within bolt28 as shown in solid lines in FIGURE 6.

As head piece 23 moves to the right it rides over cam 42 andagainst theaction of spring 44, and when the door is opened and the handle 47released, the bolt 28 is maintained in the position shown in FIGURE 4due to the binding action of cam shoulder 36 against head piece 23.

The bolt 28 assumes the semi-extended position illustrated in FIGURE 3when the door is in open position. When the door is being closed thetapered part 30 of bolt 28 strikes against the keeper plate on the doorframe and the bolt 28 is urged to the right (when viewed in FIG- URE 3)and against the tension of spring 40. This movement to the right of bolt28 to the ring also moves pin 45 to the right and against cam lobe 46 ofcam 42. This results in pivoting cam 42 clockwise on pivot pin 43 andagainst the action of spring 44. The pivoting action of cam 42 in aclockwise direction results in moving head piece 23 to the right. Whencam 42 is pivoted to a degree suflicient to allow head piece 23 to passover cam lobe 46, the bolt 28 (and attached members 25, 23 and 19) willassume the fully extended (door-closed) position illustrated in FIGURE4, due to the action of spring 40. In this position the bolt 28 is fullyextended into the keeper plate on the door frame and at the same timetransverse dead lock cross bar 34 is in the fully extended position asshown in FIGURE 5, due to the action of cam surface 37 of latch draw bar25, on recessed cam 35 surface in dead lock cross bar 34. In this fullyextended position the bolt cannot be forcibly pressed back into cylinder4, nor can dead l-ock cross bar 34 forcibly be pressed back into bolt28, and the only possible way that the bolt can be withdrawn intocylinder 4 is by turning the door handle 47.

To open the door, the handle 47 and attached pinion are turned clockwise(see FIGURE 4) and the rack 19,

6 head piece 23, bolt draw bar 25 and attached bolt 28 are moved to theright. As head piece 23 moves to the right it will slide over cam 42 andassume the position shown in FIGURE 3, and when handle 47 is releasedthe lock will maintain the position shown in FIGURE 3 due to a bindingaction between cam 42 and head piece 23.

What is claimed is:

1. A door lock and keeper comprising in combination a containing chamberadapted to be inserted in the edge of a door, a spring loaded boltslidable in the chamber and adapted to extend and retract from one endthereof, a bolt draw bar having opposite ends mounted for longitudinalsliding movement in said chamber and being operatively connectedadjacent one end thereof to said bolt, a rack secured to the other endof said bolt draw bar, a pinion journalled for rotation within saidchamber and engaging said rack, handle means mounted at right angles tosaid chamber and externally thereof, a spindle secured to said pinionand extending through said chamber to mount said handle, means in saidchamber cooperating between said bolt and draw bar for maintaining saidbolt in either the extended or retracted position, a dead lock crossbar, said bolt having a transverse bore in which said dead lock crossbar is mounted for movement, the inner end of said bolt having alongitudinal bore communicating with said transverse bore, said deadlock cross bar having a conical aperture, and said one end of the drawbar being of conical configuration and engaging the longitudinal bore inthe bolt, said conical end selectively engaging the conical aperturethereby being adapted to eject said dead lock cross bar by saidengagement.

2. The device according to claim 1 in which the means in said chambercooperating between said bolt and said draw bar includes a head piecesecured to the inner end of said rack and depending downwardlytherefrom, the lower end of said head piece surrounding and beingsecured to the inner end of said draw bar, a spring loaded carnpivotally mounted in said chamber and being engageable by said headpiece, said head piece being adapted to pass over said cam in eitherdirection as said draw bar is moved longitudinally in said chamber, apin freely mounted for longitudinal movement in said chamber parallel tosaid draw bar and extending freely between the rear side of said boltand the front side of said cam and movable in one direction by said camand in the other direction by said bolt, said pin, when said bolt isretracted, assisting in holding said spring loaded cam against said headpiece thereby preventing said spring loaded bolt from extending untilsaid handle is rotated.

3. A door lock and keeper comprising in combination a containingchamber, adapted to be inserted in the edge of a door, a spring loadedbolt slidable in said chamber and adapted to extend and retract from oneend thereof, a bolt draw bar having opposite ends mounted forlongitudinal sliding movement in said chamber and being operativelyconnected adjacent one end thereof to said bolt, a rack secured to theother end of said draw bar, a pinion journalled for rotation within saidchamber and engaging said rack, handle means mounted at right angles tosaid chamber and externally thereof, a spindle secured to said pinionand extending through said chamber to mount said handle, means in saidchamber cooperating between said bolt and draw bar for maintaining saidbolt in either the extended or retracted position, said cooperatingmeans including a head piece secured to the inner end of said rack anddepending downwardly therefrom, the lower end of said head piecesurrounding and being secured to the inner end of said bolt draw bar, aspring loaded cam pivotally mounted in said chamber and being engageableby said head piece, said head piece being adapted to pass over said camin either direction as said draw bar is moved longitudinally in saidchamber, a pin freely mounted for longitudinal movement in said chamberparallel to said draw bar and extending freely between the rear side ofsaid bolt and the front side of said 8 a cam and movable in onedirection by said cam and in References Cited by the Examiner the otherdirection by said bolt, said pin, when said bolt is retracted, assistingin holding said spring loaded cam UNITED STATES PATENTS against saidhead piece thereby preventing said spring 1,758,203 5/1930 Segal 70131loaded bolt from extending until said handle is rotated, 5 2,181,76211/1939 Milligan 70143 a dead lock cross bar mounted transversely formovement in the extending end of said bolt, and means cooperatingbetween said bolt draw bar and said dead lock cross bar EDWARD ALLENPnmary Exammer' adapted to eject one end of said dead lock cross barwhen JOSEPH D. SEERS Examiner said bolt is extended and to permit theretraction of said 10 dead lock cross bar when said bolt is retracted.I. R. MOSES, Assistant Examiner.

1. A DOOR LOCK AND KEEPER COMPRISING IN COMBINATION A CONTAINING CHAMBERADAPTED TO BE INSERTED IN THE EDGE OF A DOOR, A SPRING LOADED BOLTSLIDABLE IN THE CHAMBER AND ADAPTED TO EXTEND AND RETRACT FROM ONE ENDTHEREOF, A BOLT DRAW BAR HAVING OPPOSITE ENDS MOUNTED FOR LONGITUDINALSLIDING MOVEMENT IN SAID CHAMBER AND BEING OPERATIVELY CONNECTEDADJACENT ONE END THEREOF TO SAID BOLT, A RACK SECURED TO THE OTHER ENDOF SAID BOLT DRAW BAR, A PINION JOURNALLED FOR ROTATION WITHIN SAIDCHAMBER AND ENGAGING SAID RACK, HANDLE MEANS MOUNTED AT RIGHT ANGLES TOSAID CHAMBER AND EXTERNAL THEREOF, A SPINDLE SECURED TO SAID PINION ANDEXTENDING THROUGH SAID CHAMBER TO MOUNT SAID HANDLE, MEANS IN SAIDCHAMBER COOPERATING BETWEEN SAID BOLT AND DRAW BAR FOR MAINTAINING SAIDBOLT IN EITHER THE EXTENDED OR RETRACTED POSITION, A DEAD LOCK CROSSBAR, SAID BOLT HAVING A TRANSVERSE BORE IN WHICH